Communication system, network router and network connection method applying address conversion

摘要

A connection adapter (1) is interposed between high-level equipment (10) and a communication module (20). The connection adapter (1) and a router (60) perform a circuit control and an address conversion processing so that the high-level equipment (10) and a management computer (51) set for the network connection service giving a fixed IP address can use the network connection service giving a dynamic IP address.